You havent mentioned if yours is a 4 Cylinder 2.4 or a V6 3.0. However, whichever it is, you look like another victim of Honda Drive By Wire (DBW) system. It has an inherent lag in it, so throttle response is never going to be lightning fast. Also, since the gear shift is optimized somewhere between performance and economy, it does actually get the car thinking if you floor the pedal all of a sudden. First the car tries to pull without changing the gear, making use of engine torque, and 99 percent of the times it can't. After that it downshifts and there you go! A huge surge of power enough to launch the car into space, and all you're trying to do is get past a slow moving vehicle decently.
The suspension is pretty hard. In fact really hard. In fact, sports car category hard. It will let you know about each and every bump and pothole you hit or miss. And it will sway you from left to right if you encounter a speed bump diagonally.
I'm sure you did not have any of these problems in your Tiida. Thats because it actually didnt have these problems. It is quick, responsive and comfortable, and despite your elevated expectations, the Accord would certainly disappoint you in all these ways because thats how it is built. Theres nothing wrong with your car, get it serviced, change the lubricants, do whatever, your driving experience will remain the same.